Machine for pricking leather preparatory to stitching



UNITED sTATEs PATENT oEEroE. i

SAMUEL SHELDON, OF CINCINNATI, OHIO.

MACHINE FOR PRICKING LEATHER PREPARATORY TO STITCHING.

Specification of Letters Patent No. 1,817dated October 10, 1840; Antedated September 30, 1840.

To all whomy t may concern:

Be it known that I, SAMUEL SHELDON, of Cincinnati, in the State of Ohio, have invented a new and useful improvement in the manner of constructing the machine for pricking leather preparatory to the stitching it for harness, the same being a further improvement on the machine originally pat-- ented by J. W. Briggs, Luther O. Garner, and Joseph S. Garner, and for improvements upon which I obtained Letters Patent of the United States, dated on the 3d day of August, 1839-, and for further improvements on which I have also obtained Letters Patent bearing date the 21st day of September, 1840.

The improved machine of which the following is a description or specification, I denominate the thorough brace pricker; and this machine is the same in its general construction with those above alluded to; but it is so modified' as to adapt it to work of a heavier kind than that which can be conveniently performed by the power of the foot applied upon a treadle; such for vexample as the piercing or pricking the holes for stitching through thorough braces, which are frequently from an inch to an inch and a quarter in thickness.

In the accompanying drawing A, A, is the bench upon which the principal operating parts of the machine are sustained.

B, is a post, or upright, firmly connected with the other parts of the frame work, and carrying a. iy, or balance wheel C, which is to be turned by the handle C. Upon the shaft of this fly wheel there is a crank or pitman wheel D, to which the pitman E, is attached by means of a joint or cra-nk pin, said wheel having several holes in it at di'erent distances from its center, so asto lengt-hen or shorten its action as a crank, in a manner well known to machinists; by this means the motion of the awl-sha-ft is regulated. This pitman is jointed to the a-wlshaft E, which slides back and forth through the awl-shaft guide, or head P; the head or brace y, being that which sustains the trace, or other' article of leather to be pierced, as in my other machines. S, is a st-ra of leather which is fastened at one end to tie stud S', on the outer end of the awl shaft. This strap passes over a rollerrin the head P, and bending down on the inner side of this roller, is attached to a slide, or flat rod of metal T, which has aweight U, on its lower end, to cause it to descend as the lawl-shaft advances. The slide T, serves to regulate the feeding' motion of the clamp L, which has a rank on the under side of its carriage part H, said rack being operated on by a pinion on the shaft Q, of the ratchet wheel Q, as described in my former patents.

The slide T, is pierced with a number of holes, one above another, and into either of these holes is inserted a pin t, and this pin coming into contact with the feed arm, or lever R, which works on a joint pin at 0;, carries the pa-wl W, and consequently the ratchet wheel Q, forward, thus sliding the clamp to a distance governed by the lift of the pin t; the feed of the clamp is also regulated by the shifting of the pit-man E, on its crank pin, as this regulates the lift of the slide T. The catch X, serves to check the ratchet wheel as the pawl W, returns.

F, F, are the standards which support the clamp and serves as guides to its carriage, or sliding part H. As this machine is for the largest class of work, the clamp L, must be made proportionately strong and heavy, I therefore, to decrease its friction, and enable it to slide readily, place under it several friction rollers, one of which is seen at the end G.

The jaws of this clamp are to be secured in the manner described bv me in the specification'of the Letters Patent granted to me under date of the twenty-first of September, 1840, and does not need therefore, to be here particularly explained.

- N, Fig.,1, are the heads of the screws. Fig. 2, is the clamp opened out.V Fig. 3, a transverse section of it, and Fig. 4c, its under side, with the rack K, let into the groove I.

Having thus fully described the construction and operation of my thorough brace pricker, what I claim therein as new, and desire to secure by Letters Patent, is

1.7The arrangement for regulating the feed by which the clamp is moved, and the distances of the stitches governed; that is to say,

2. I claim the mode of combining the awlnected with the other parts Of the appaslifethe strzp the slide g, and its pin t, ratas as herein set forth. an( tie Weio'it as descri ed.

3. And inh Combination therewith I claim SAMUEL SHELDON 5 the auxiliary ineens of regulating the feed, Witnesses:

by means of the ptman E, combined with THOS. P. JONES, the pitlnan Wheel D, and the strap S, con- W. THOMPSON. 

